Patent GB-472776-A (GB)
Title: Method of and apparatus for recording and registering results of calculating operations, e.g. the determination and carrying forward of balances in calculating machines
IPC: C10L1/00
Filed: 1936-06-23
Abstract: 472,776. Calculating- apparatus. MERCEDES BUROMASCHINEN - WERKE AKT.- GES. June 23, 1936, No. 17413. Convention date, June 28, 1935. [Class 106 (i)] A typewriter calculating-machine for preparing account statements is provided with means to take a total or balance and to record this balance by punching the account card or sheet. Means are also provided whereby the punched record is utilized during the next entering operation to control automatically the entry of this old balance into the registering mechanism and to print it on the account card. The machine is similar to that described in Specification 438,369 wherein the balance on the line totalizer Q, Figs. 1 and 2, is transmitted automatically, on depression of the total key SQ, to the column totalizer Z6 denomination by denomination. The paper carriage 4 that supports the platen 5 is formed with two tubular shafts 17, 18 on which bear rollers of a second carriage formed by plates 19, 20 with a slot E for the insertion of the account card. To the shaft 17, Figs. 1 and 14, is secured two collars 42, 43 on which bear springs 48, 49, the other ends of which engage collars 47, 46 loose on the shaft and normally bearing on opposite sides of a guide arm 41 secured to the member 19. Secured to the member 19 is a bracket 52, Figs. 1a, 2 and 14, on which is pivotally mounted the cores 55 ... 58 of electromagnetic coils 59 ... 62 with armatures 65 ... 68 engaging spring-controlled punches 73 ... 76 guided in the member 19. The member 19 also carries a plate 85 of insulating material in which is embedded a bus-bar 87 arranged to co-operate with testing pins 91 ... 94 slidably mounted in tubes in insulating sleeves 95a ... 98a on the member 20 and co-operating with insulated contact springs 99 ... 102. At the end of the member 19 opposite to that carrying the magnets 59 ... 62 is another magnet 123 co - operating with a punch 127, Fig. 1. Receptacles 115, 135 are mounted on the member 20 to collect the card punching waste. The member 20 carries two slidably mounted sensing pins 142, 149, Fig. 3, articulated to arms 139, 145 of a shaft 138 journalled in the member 20. Another arm 151 secured to the shaft 138 is connected by a spring 157 to an arm 154 loose on the shaft ; the arm 154 carries a pin 164 secured to a slide 160 having an operating lever 158. The member 20 also carries a projecting angle member 165, Figs. 14 and 15, with a frictionally mounted pawl 168 adapted to co-operate with a stop 172 arranged on the machine frame. Two shafts 178, 186, corresponding to the shafts 58, 68 of the machine described in the above-mentioned Specification, are geared together by pinions 180, 183, Figs. 2 and 9 ; the shaft 186 carries a rotatably mounted cam 187 co-operating with a lever 190 on a stud 195 that carries two arms 191, 192 that are connected to the cores of . electromagnets 215, 222 respectively. The lever 190 acts with its bent end on a spring- controlled lever 199 pivoted to a plate on the lever of the space key 205. To the lever 199 is secured a pin that engages the projecting end 210 of the arm 191. The arm 192 is acted upon by a pin 217 projecting from the arm 191 and is formed with a locking nose 226 adapted to co-operate with a spring-controlled clutch pawl 228 pivoted on a cam disc 229 loose on the shaft 186 but secured, through its boss, to the cam 187. When the arm 192 is displaced the pawl 228 is caused to engage a notched cam 234 secured to the shaft 186 to effect the rotation of the cams 187, 229. The rotation of'the cam 229 through a lever 237 effects the closure of contacts 242, 244. The shaft 251, Figs. 2 and 10, of the differential actuator Zs of the totalizers has secured thereto an arm 252 with a sector-shaped end 255 carrying a metal plate 256 and a plate 257 of insulating material with apertures through which extend contact pins 258 projecting from the metal plate. These pins co-operate with spring contacts 259 ... 262 mounted on a plate of insulating material and arranged in the circuit of the electromagnets 59 ... 62. A set of ten electro - magnets 268 ... 277 is arranged beneath the numeral key levers and the cores of these magnets are connected thereto. These magnets are arranged in the circuits of groups of contacts K1 to K27 controlled by electromagnets 308 ... 311, Fig. 4. The first group of contacts Kl to K7 are controlled by the armature 321 of the electromagnet. 308 ; the arrangement is shown in Figs. 7 and 8, the contacts comprise spring plates mounted on opposite sides of insulating bars 324, 344x, the contacts K2, K3, K4 and K7 being normally closed. The magnets 309 ... 311 and the contacts are similar in construction, the normally closed contacts being shown black in Fig. 4. These magnets and contacts may be arranged in the machine or in a housing alongside thereof. Additional contacts K28 ... K30 are mounted on a bar 363, Figs. 11, 12 and 13, of insulating material on the carriage and co-operate with a contact rail K31 on the machine frame. On the shaft 178 is mounted a commutator plate 364, Fig. 4, that co-operates with contact blades 366, 367 on a fixed insulated plate 368 forming a contact K32. The complete circuit arrangement is shown in Fig. 4 and switches S1, S2 connect the leads to the mains A, B. Total taking operation. When a transaction has been entered on an account card as shown in Fig. 16 and the paper carriage has moved to the new balance position the total key SQ is depressed and the total on the cross totalizer Q is transmitted automatically in the manner described in the above-mentioned Specification to the column totalizer Z6 and typed on the card. At the same time a punched representation of this total is effected on the card. The punch carriage 19, 20 is held stationary, as the paper carriage tabulates in a step-by-step manner, when the pawl 168 comes into engagement with the projection x4, Fig. 11, of the stop 172. In this position also the contact K28 is in engagement with the plate K31. Considering the value " 3 the first number to be transmitted and punched the segment. Zs and arm 252 are rocked in accordance with the value so that the contact pin 258 coacts with the spring contact 261. When the arm 252 comes to rest in its set position, the commutator contact K32 on the rotating shaft 178 closes and a circuit is completed through the path B, K32, 258, 261, 61, K28, K31, S1, to A. The magnet 61 acts on the punch 75 to effect a punching L1 on the card. The other numbers are punched in a similar manner to form a line L1, L2 ... L7, the account card moving with the paper carriage in the slot E on the stationary punch carriage. The punches are operated in accordance with the code represented in Fig. 23. When this punching operation is completed the total key rises automatically and opens the switch S1. During the paper carriage movement to the left the spring 49 has been stressed and will act to restore the punch carriage to normal position on the return movement of the paper carriage. Shortly before the completion of the carriage movement the pawl 168 engages the stop 173 and arrests the punch carriage in the position shown in Fig. 12 with the contact K30 in engagement with plate K31. Switches S1, S2 are now closed and a circuit is completed as follows : A, S1, K31, K30, coils 123, and 59, S2 and B. The energization of the magnets operate punches 73 and 127 to produce marginal control perforations L8. Record control operation. The card is inserted in the slot E so that its lower edge falls between the rollers 176, 177 and the operating lever 158 is moved in the direction of the arrow a, Fig. 3, so as to cause the pins 142, 149 to bear on the card, the card is then forwarded by the rollers until the pins enter the marginal perforations L8. When the card is in this position the lever 158 is restored to normal to withdraw the pins 142, 149. After entering debit or credit items the paper carriage is tabulated to column IV position, in which position as shown in Fig. 13, the contact K29 coacts with plate K31 and the pawl 168 is brought into engagement with projection x2 of the stop 172 to hold the punch carriage stationary during the further step-by-step movements of the paper carriage. In this position the perforations L1 are opposite the sensing pins 91 to 94. In the example above set forth the number " 3 " is punched so that the sensing pin 93 is opposite the perforation. If the switch S1 is now closed a circuit is completed from A, S1, K31, K29, 87, 93, 101, coils 310 and 222 to B. The energization of magnet 310 switches over the contacts K14 to K20 and a circuit is formed through the path A, S1, K29, Lt, K21, K16, K10, K3, coil 270 and K. At the same time the energization of magnet 222 influences the rod 220, Fig. 9, so as to withdraw the nose of the arm 192 from engagement with the coupling pawl 228 which moves into clutch engaging position with the cam 234 of the continuously rotating shaft 186 thereby closing the contact K and energizing coil 270 to pull down the key lever for the numeral " 3," which number is entered in the appropriate denomination of the column totalizer 24. The punch carriage being held stationary during the step movement of the carriage brings the next set of perforations L2 opposite the sensing pins and so on. The step movement of the paper carriage to pass the punctuation position is effected through a circuit A, S1, K31, K29, Lt, K21, K14, K13 K7, coil 215, and B. The coil 215 when energized operates arm 191 to swing lever 199 into path of movement of arm 190 so as to effect depression of the space bar 205. After the last sensing operation the switch S1 is opened and the pawl 168 is rendered inoperative so as to permit the punch carriage to return to normal position. The paper carriage is then tabulated to the new balance position and the total key SQ depressed to punch the new balance as shown by perforations L9 and the control marginal perforations L10. In th